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empirefx/GIFEncoder.class.php

Created February 3, 2012 23:51
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Captcha animado GIFEncoder
Raw
GIFEncoder.class.php
<?php
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFEncoder Version 2.0 by László Zsidi, http://gifs.hu
::
:: This class is a rewritten 'GifMerge.class.php' version.
::
:: Modification:
:: - Simplified and easy code,
:: - Ultra fast encoding,
:: - Built-in errors,
:: - Stable working
::
::
:: Updated at 2007. 02. 13. '00.05.AM'
::
::
::
:: Try on-line GIFBuilder Form demo based on GIFEncoder.
::
:: http://gifs.hu/phpclasses/demos/GifBuilder/
::
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
*/
Class GIFEncoder {
var $GIF = "GIF89a"; /* GIF header 6 bytes */
var $VER = "GIFEncoder V2.05"; /* Encoder version */
var $BUF = Array ( );
var $LOP = 0;
var $DIS = 2;
var $COL = -1;
var $IMG = -1;
var $ERR = Array (
ERR00=>"Does not supported function for only one image!",
ERR01=>"Source is not a GIF image!",
ERR02=>"Unintelligible flag ",
ERR03=>"Does not make animation from animated GIF source",
);
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFEncoder...
::
*/
function GIFEncoder (
$GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,
$GIF_red, $GIF_grn, $GIF_blu, $GIF_mod
) {
if ( ! is_array ( $GIF_src ) && ! is_array ( $GIF_tim ) ) {
printf ( "%s: %s", $this->VER, $this->ERR [ 'ERR00' ] );
exit ( 0 );
}
$this->LOP = ( $GIF_lop > -1 ) ? $GIF_lop : 0;
$this->DIS = ( $GIF_dis > -1 ) ? ( ( $GIF_dis < 3 ) ? $GIF_dis : 3 ) : 2;
$this->COL = ( $GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1 ) ?
( $GIF_red | ( $GIF_grn << 8 ) | ( $GIF_blu << 16 ) ) : -1;
for ( $i = 0; $i < count ( $GIF_src ); $i++ ) {
if ( strToLower ( $GIF_mod ) == "url" ) {
$this->BUF [ ] = fread ( fopen ( $GIF_src [ $i ], "rb" ), filesize ( $GIF_src [ $i ] ) );
}
else if ( strToLower ( $GIF_mod ) == "bin" ) {
$this->BUF [ ] = $GIF_src [ $i ];
}
else {
printf ( "%s: %s ( %s )!", $this->VER, $this->ERR [ 'ERR02' ], $GIF_mod );
exit ( 0 );
}
if ( substr ( $this->BUF [ $i ], 0, 6 ) != "GIF87a" && substr ( $this->BUF [ $i ], 0, 6 ) != "GIF89a" ) {
printf ( "%s: %d %s", $this->VER, $i, $this->ERR [ 'ERR01' ] );
exit ( 0 );
}
for ( $j = ( 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) ), $k = TRUE; $k; $j++ ) {
switch ( $this->BUF [ $i ] { $j } ) {
case "!":
if ( ( substr ( $this->BUF [ $i ], ( $j + 3 ), 8 ) ) == "NETSCAPE" ) {
printf ( "%s: %s ( %s source )!", $this->VER, $this->ERR [ 'ERR03' ], ( $i + 1 ) );
exit ( 0 );
}
break;
case ";":
$k = FALSE;
break;
}
}
}
GIFEncoder::GIFAddHeader ( );
for ( $i = 0; $i < count ( $this->BUF ); $i++ ) {
GIFEncoder::GIFAddFrames ( $i, $GIF_dly [ $i ] );
}
GIFEncoder::GIFAddFooter ( );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddHeader...
::
*/
function GIFAddHeader ( ) {
$cmap = 0;
if ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x80 ) {
$cmap = 3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) );
$this->GIF .= substr ( $this->BUF [ 0 ], 6, 7 );
$this->GIF .= substr ( $this->BUF [ 0 ], 13, $cmap );
$this->GIF .= "!\377\13NETSCAPE2.0\3\1" . GIFEncoder::GIFWord ( $this->LOP ) . "\0";
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddFrames...
::
*/
function GIFAddFrames ( $i, $d ) {
$Locals_str = 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) );
$Locals_end = strlen ( $this->BUF [ $i ] ) - $Locals_str - 1;
$Locals_tmp = substr ( $this->BUF [ $i ], $Locals_str, $Locals_end );
$Global_len = 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 );
$Locals_len = 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );
$Global_rgb = substr ( $this->BUF [ 0 ], 13,
3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) ) );
$Locals_rgb = substr ( $this->BUF [ $i ], 13,
3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) );
$Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS << 2 ) + 0 ) .
chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . "\x0\x0";
if ( $this->COL > -1 && ord ( $this->BUF [ $i ] { 10 } ) & 0x80 ) {
for ( $j = 0; $j < ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ); $j++ ) {
if (
ord ( $Locals_rgb { 3 * $j + 0 } ) == ( ( $this->COL >> 16 ) & 0xFF ) &&
ord ( $Locals_rgb { 3 * $j + 1 } ) == ( ( $this->COL >> 8 ) & 0xFF ) &&
ord ( $Locals_rgb { 3 * $j + 2 } ) == ( ( $this->COL >> 0 ) & 0xFF )
) {
$Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS << 2 ) + 1 ) .
chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . chr ( $j ) . "\x0";
break;
}
}
}
switch ( $Locals_tmp { 0 } ) {
case "!":
$Locals_img = substr ( $Locals_tmp, 8, 10 );
$Locals_tmp = substr ( $Locals_tmp, 18, strlen ( $Locals_tmp ) - 18 );
break;
case ",":
$Locals_img = substr ( $Locals_tmp, 0, 10 );
$Locals_tmp = substr ( $Locals_tmp, 10, strlen ( $Locals_tmp ) - 10 );
break;
}
if ( ord ( $this->BUF [ $i ] { 10 } ) & 0x80 && $this->IMG > -1 ) {
if ( $Global_len == $Locals_len ) {
if ( GIFEncoder::GIFBlockCompare ( $Global_rgb, $Locals_rgb, $Global_len ) ) {
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
}
else {
$byte = ord ( $Locals_img { 9 } );
$byte |= 0x80;
$byte &= 0xF8;
$byte |= ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 );
$Locals_img { 9 } = chr ( $byte );
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
}
}
else {
$byte = ord ( $Locals_img { 9 } );
$byte |= 0x80;
$byte &= 0xF8;
$byte |= ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );
$Locals_img { 9 } = chr ( $byte );
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
}
}
else {
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
}
$this->IMG = 1;
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddFooter...
::
*/
function GIFAddFooter ( ) {
$this->GIF .= ";";
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFBlockCompare...
::
*/
function GIFBlockCompare ( $GlobalBlock, $LocalBlock, $Len ) {
for ( $i = 0; $i < $Len; $i++ ) {
if (
$GlobalBlock { 3 * $i + 0 } != $LocalBlock { 3 * $i + 0 } ||
$GlobalBlock { 3 * $i + 1 } != $LocalBlock { 3 * $i + 1 } ||
$GlobalBlock { 3 * $i + 2 } != $LocalBlock { 3 * $i + 2 }
) {
return ( 0 );
}
}
return ( 1 );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFWord...
::
*/
function GIFWord ( $int ) {
return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GetAnimation...
::
*/
function GetAnimation ( ) {
return ( $this->GIF );
}
}
?>
Raw
index.php
<?php
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFEncoder Version 2.0 by László Zsidi, http://gifs.hu
:: http://www.phpclasses.org/browse/file/17972.html
::
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
*/
include "GIFEncoder.class.php";
class Captcha
{
protected $captcha;
protected $clave;
function __construct()
{
$rnd = rand(0, 1000000);
$key = strtoupper(substr(md5( microtime() * $rnd),1,5));
$this->clave = $key;
$this->captcha = imagecreatefromgif('bg.gif');
$posicion_x=15;
for($i = 0;$i<strlen($key);$i++){
$r=rand(0,255);
$g=rand(0,255);
$b=rand(0,255);
$posicion_y=rand(20,40);
$colorText = imagecolorallocate($this->captcha, $r, $g, $b);
imagestring($this->captcha, 30, $posicion_x, $posicion_y, $key[$i], $colorText);
$posicion_x+=25;
}
//Fix con el color de la segunda letra
$white = ImageColorAllocate($this->captcha,0,0,0);
ImageColorTransparent($this->captcha,$white);
}
public function imprimir()
{
if (!empty($this->frames) AND !empty($this->framed))
{
$gif = new GIFEncoder($this->frames, $this->framed, 0, 2, 0, 0, 0, 'url');
Header ('Content-type:image/gif');
echo $gif->GetAnimation();
imagedestroy($this->captcha);
}else{
Header('Content-type:image/gif');
imagegif($this->captcha);
}
}
public function guardar()
{
$_SESSION['CAPTCHA_TEXT'] = $this->clave;
return $this->clave;
}
}
class Animacion extends Captcha
{
public $frames;
public $framed;
function __construct($aleatorio = 1)
{
parent::__construct();
if ($aleatorio == 1) {
$n = rand(1,3);
$n == 1 ? $this->circulo() : 'no' ;
$n == 2 ? $this->bum() : 'no' ;
$n == 3 ? $this->desliz() : 'no' ;
}
}
public function circulo()
{
$circulo_x = 40;
$circulo_y = 0;
$frames_x = 20;
for($b=0;$b<$frames_x;$b++){
$im = imagecreatetruecolor(150, 80);
imagecopy($im, $this->captcha, 0, 0, 0, 0, imagesx($this->captcha), imagesy($this->captcha));
//fix
$white = ImageColorAllocate($im,255,255,255);
ImageFill($im,0,0,$white);
$circulo = imagecolorallocate($im, 0, 0, 0);
imagefilledellipse( $im, $circulo_y, $circulo_x, 30, 30, $circulo );
$fname = 'tmp/'.$b.'.gif';
imagegif($im, $fname);
$this->frames[] = $fname;
$this->framed[] = 1;
$circulo_y+=10;
imagedestroy($im);
}
$this->imprimir();
}
public function bum()
{
$frames_x = 30;
for($b=0;$b<$frames_x;$b++){
$im = imagecreatetruecolor(150, 80);
imagecopy($im, $this->captcha, 0, 0, 0, 0, imagesx($this->captcha), imagesy($this->captcha));
//fix
$white = ImageColorAllocate($im,255,255,255);
ImageFill($im,0,0,$white);
imagefilledrectangle($im,($b*5),($b*5),10+($b*5),10+($b*5),0);
imagefilledrectangle($im,($b*1),($b*5),10+($b*1),10+($b*5),0);
imagefilledrectangle($im,($b*3)*2,($b*1)+$b,10+($b*3)*2,10+($b*1)+$b,0);
imagefilledrectangle($im,($b*4)*2,($b*2)+$b,10+($b*4)*2,10+($b*2)+$b,0);
$fname = 'tmp/'.$b.'.gif';
imagegif($im, $fname);
$this->frames[] = $fname;
$this->framed[] = 1;
imagedestroy($im);
}
$this->imprimir();
}
public function desliz()
{
$imgwidth = imagesx($this->captcha);
$imgheight = imagesy($this->captcha);
$frames_x = 30;
for($b=0;$b<$frames_x;$b++){
$im = imagecreatetruecolor(150, 80);
imagecopy($im, $this->captcha, 0, 0, 0, 0, imagesx($this->captcha), imagesy($this->captcha));
//fix
$white = ImageColorAllocate($im,255,255,255);
ImageFill($im,0,0,$white);
imagefilledrectangle($im,($b - 1) * 8 + 8,1,$imgwidth,$imgheight, 0);
$fname = 'tmp/'.$b.'.gif';
imagegif($im, $fname);
$this->frames[] = $fname;
$this->framed[] = 1;
imagedestroy($im);
}
$this->imprimir();
}
}
// Animacion aleatoria
$showtime = new Animacion();
//$showtime->guardar();
// Seleccionar animacion
//$showtime = new Animacion(0);
//$showtime->bum();
// Sin animacion
//$showtime = new Captcha();
//$showtime->imprimir();
?>
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